[HasuMasu]

Originally Posted by Randrak42

Or maybe they tripped on the inter-dimensional 13th* step hit their heads and died a slow and agonizing death!

Spoiler for *:

Manga reference and one of the seven mysteries (doubt it counts as much of a spoiler considering the anime skipped it...and is ending)

Spoiler for lol:

This actually makes sense since the 13th step leads to a fall.